Building-slab



O. A. HANSZEN.

BUILDING SLAB APPLICATION FILED FEB.11,1920- Patented Apr. 19,1921.

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oscana. HANSZEN', or DALLAS, TEXAS.

BUILDING-SLAB.

Be it known that I,;, OscAn A. HANSZEN, a citizen of the UnitedStates, residing at Dallas, in the county of Dallas and State of Texas, have invented certain new and useful Improvements in Building-Slabs, of which the following is a specification.

This invention relates to new and useful improvements in building slabs for constructing upright walls.

The aim of this invention is to provide a slab or unit which may be utilized in constructing a wall in which vertical flues or air spaces will be present, and to embody in such a slab certain particular features, whereby the slab may be easily and inexpensively produced and a wall constructed of said slabs without elaborate forms thereby reducing the cost of construction and eliminating a considerable usage and waste of lumber. Another'feature is to provide a slab of such a nature that when a plurality are assembled in a wall, those on one side may be insulated from those on the opposite side.

In carrying out the invention a slab is formed of plastic material such as concrete, terra cotta or other suitable material and is rovided with a rough or finished outer face.

n its rear or inner side the slab has a longitudinal sump or channel; while the vertical edges of the slab are beveled outwardly from its face. 'In constructing a wall the slabs are superimposed in vertical columns and said slabs are disposed with their inner sides or backs in registration, whereby the sumps form vertical air flues or spaces and the beveled edges provide mortar seats or joints which exhibit in cross-section, a dovetail shape, between the edges of adjacent slabs on each side of the wall. Other features will hereinafter be brought out.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings, in which an example of the invention is shown, and wherein:

Figure 1 is a view showing a portion of a wall constructed with slabs embodying this invention, and I Fig. 2 is a view of the upper portlon of one of said slabs. i

In the drawings the numeral 10 designates a slab which while preferably formed of a plastic material may be made of any .of the mortar joints. the use of a large quantity of lumber usu- Specificationof Letters Batent. I Patent d-A 19 1921? Application filed February 11, 1920-. Serial at. 357,923.

a smooth face'or outer side 11 or this face may be formed to embody some particular deslgn or configuration.

It is preferable to give the slab a greater length than width but this is not essential, although it makes a better design where the slabs are arranged in upright columns. The slab has in its rear or inner side a longitud nal sump or channel 12 extending its entire length and having such a width as to provide outwardly directed flanges 13 along each vertical edge of the slab. Each vertical edge or end 1 1 of the slab is beveled outwardly and rearwardly from the face 11.,

It is pointed out that the degree of the angle'of this bevel may be varied as the condltions may require and the particular angle shown in the drawings is merely an exemplification. It is obvious that the slab could be formed by pressing in a suitable mold or by pouring a mixture into a suitable mold.

In constructing a wall the slabs are placed With their backs together so that the flanges 13 of the slabs on one side of the wall register with the flanges .13 of the slabs on the other side of the wall and the faces 11 form the outer sides of the wall as is shown in Fig. 1. The slabs are superimposed in vertical columns and may be'in break-joint relation. It will be seen that the registering sumps 12 form vertical air flues and by coating the rear edges of the flanges 13 with tar or other water proofing material, an ins1 1 l ated construction is had.

The slab columns are spaced apart and mortar 15 is inserted in the spaces. The beveled edges 14 of adjacent slabs on each side of the wall form dove-tail seats for the.

each flaringoutward in both directions from its center, are provided and the lateral displacement of the slabs precluded. In constructing such a wall it is merely necessary to provide guides and strips on each side This does away with ally employed in erecting forms and thus expense and waste are eliminated to a great extent by the use of this slab. It is possible materialfsuitable for the purpose for which 1 the slab 1s to be used. The slab may have,

to cast the slabs so that their faces 11 will be smooth without troweling and paint may be applied directly to such faces.

What I claim, is: a w

A wall comprising vertical sets of blocks,

each block in each set comprising a pair of Opposed slabs, each slab being provided at its vertical edges with inwardly directed lateral flanges, the flanges of the 7 two slabs forming an air opening in the block, said flanges of eachslab having their outer faces converging toward the outer face of the slab, the flanges at each Vertical edge of the block tions toward its free ends, and a column of plastic material molded in said; space and having a similar shape in horizontal-cross section, said column having its opposite sides terminating substantially flush with the opposite faces of said blocks. e

In testimony whereof I afiix my si nature.

osc A. HAN ZEN; V 

